my display has a crack after a fall. So I ordered a display for $ 42 at Aliexpress . A colleague wanted to replace , he works for a repair service . Unfortunately, he stopped because the E8 is very difficult to repair . Many layers, which are glued together. And it all depends on the rear of the display. A repair from an online dealer in Germany would cost about more then 200 euros, and that's too expensive. So I rather live with it. And yes, you need both.